Apparatus for the formation of concrete piles in situ



A. F. BARNES March 8, 1932.

APPARATUS FOR THE FORMATION OF CONCRETE FILES IN SITU Filed June 3. 1929 M Mm ATTORNEY.S

Patented Mar. a, 1932 ALBERT r. Ben-mes, DECEASED, LATE or nnooxtxn, NEW Yonx; BY ANNA En BARNES,

ixncnrnix, or BROOKLYN, new YORK- APPARATUS Eon THE FORMATION or concnn'rn runs in sun;

Application filed June 3, Serial 110,2362542.

' This invention relates to; apparatus for use in the formation of concrete piles in 'situ, and, moreparticularly,"to core'head Constructions and to correlated improvements and discov- 5 eries appertaining thereto.

Binobject ofthe invention is to provide an improved construction at the upper end of a collapsible core, whereby the strain during driving; is efiiciently distributed, and whereby during lifting, the weight of the core is removed from the collapsing links and taken upby associated parts of the core head structure. p g l Another object is to provide apparatus of V the character describedwhich'is of. simple and be exemplified in the constructions hereinafter set forth and the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention, reference should taken in connection with draw1ngs,m whlch: r j y Figure 1 1s a longitudinal section ofa colthe accompanying ing the core insertedin a pile casing, a longi tudinal portion of the core being broken y? Q I Fig. 2 is a transverse section in the direction of the arrows along the line 2-'-2.in Fig. 1;"

of the core-head construction:

I Fig.4 is a plan view thereof; and f Fig.5"is a side elevation of the core-head viewed at right-angles to Fig. 3, and showing mounted thereon. V

The exemplified apparatus comprises a collapsible core, indicated'generally at 10, of a r type suitable to besunk into the ground either alone or in conjunction with thin sheet metal be had to the following detailed description lapsible core embodying the invention, show Fig. 3 is an enlarged detail sectional View.

the lower portion of a hammer element or similar shell, such as shown at 11, to form" a cavityinto which concrete maybe poured for the formation of a concrete pile or the like. The exemplified core comprises a cente'r'bar 12 and apluralityof core leavesf13 separated longitudinally so asto permit the sameto be expanded againstthe inner surface the shell ,duringdriving, and 'to'be collapsed whenthe core is tobe withdrawmthe core leaves being connected to the center bar I by suitable toggle links, such'as indicated at in order to press the core leaves 1nto their expanded position, the center bar carries a plied to a driving-cap 17 which is preferably mounted at the upper end of the 'centerbar asby means ofscrew-threads 18. Inorder that the driving force may be evenly transmitted tothe core leaves during driving, with- .out' danger "of injury thereto, the invention contemplates the provision of a suitable ele ment, which is designated herein by the gen eral term driving-plate, andwhich is ex mplified at 19.' lhis plate is interposed between the driving-cap and the core leaves, and is adapted to transmit and distribute the force'of the hammer blows from the drivingcap to the top of the .core leaves when the latter are in expanded position. The'drivingplate 19, as exemplified, fits about the down- Wardly extending stem 20 on the driving cap and'is. slidably keyedthereto, as indicated, at

21. In order positively to limitthe expansion of the core leaves at their upper end, thedriving plate is formed, in the present instance, with a downwardly extending external flange 22'which surrounds the upper ends of the core leaves so as to limit their expanding movement, preferably at a time when the links 14 are in an approximately horizontal position.

The driving plate 19 is held against longitudinal movement with respect to the core leaves by means of a series of pins 23 which are adapted to extend into recesses 24 formed in a downwardlyextending flange 25 on the driving head, the pins being sufiiciently short so as to permit radial movement of the core leaves as the same are collapsed. In order to draw the driving plate and the core leaves upwardly when the center bar has been raised somewhat and the leaves have been collapsed to such an extent that they are free from frictional engagement with the pile shell, the internal flange 25 on the driving plate is provided with a downward extension as at 26, terminating at a point slightly removed from theupper surface of the upper wedge meme ber 15, there being thus provided a construction which combines simplicity with sturdiness, and which effectively assures the withdraw-a1 ofthecore leaves without danger of in' ry to the leaves or to the toggle'links.

, ith a view to preventing relative longitudinal movement of the driving cap and the driving plate during the driving operation,

there is provided on the drivingcap a p111- rality oflatches 27 having forked upper ends, and the driving plate is formed with recesses, indicated at 28 to receive these latches.

In order positively to separate the center-bar and the core leaves to break the clamping action of the wedging surfaces, after the driving operation is complete, the driving-cap carries a transverse shaft 28, on theends of which there are rotatably mounted the arms 29 of a U-shaped member 30, the free endsof the arms 29 being formed Withcamsurfaces 31 adapted to bear against the vupper surface of the driving-plate when the how 32 of the U-shaped member is moved upwardly. In operation, the latches 27 are detached and a line secured to the how 32 of-thel U-shaped member, and upward pull applied, The .U-shaped member is thus swung'so that the cam surface 3]. presses downwardly upon the driving-plate so as to cause relative longitudinal movement between the. driving-plate with its attached core'leaves, and the driving-cap.

Thereis thus provided a simple construction which is composed of a relatively small numberof sturdy parts, and which can be operated with a maximum of ease and with aminimum of danger of injury to the core leaves. and to :the other parts the repair or replacement of which is attended with con-, siderable difliculty.

Since certain changes may be made in the above constructionv and different embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above. description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Itis-also to be understood that the following claims are intended to cover all ofthe generic and specific features of the invention claimed as new and desired to be secured by Letters Patent is:

1. Pile-driving apparatus, comprising a center bar, core leaves collapsibly associated with said center bar, a driving cap attached to said centerbar, and a driving plate interposed between said driving cap and said core leaves, said driving plate and said core leaves being movable as a unit longitudinally of said center bar.

2. Pile-driving apparatus, comprising a center bar, core leaves collapsibly associated with said center bar, a driving cap attached to said center bar, and a driving plate interposed between said driving cap and said core leaves and mounted for longitudinal movement with respect to said center bar.

3. Pile-driving apparatus, comprising a center bar, core leaves collapsibly associated with said center bar, a driving cap attached to said center bar, a drivingplate interosed between said driving cap and said core eaves and means to prevent relative longitudinal movement of said driving plate and said core leaves, said center bar being adapted to spread saidcore leaves when the center bar is moved-downwardly with respect thereto, and said driving plate being formed with means to limit thespreading movement of said core leaves, 7

,4. Pile-driving, apparatus, comprising a center bar, core leaves collapsibly associated with, said center bar, a vdriving cap attached to said'centerrbar, and a-driving plate interposed between said drivingv cap and said core leaves, said plate and said leaves being movable as a unit longitudinally of said bar, said drivingplate being formed with an annular flange surrounding the upper ends of the core leaves at all times during the operation of the apparatus; I

means for preventing longitudinal movement 2 between said driving-plate and said core leaves while permitting, radial movement of the core leaves, and cooperating means on said driving-plate and on said center-bar for limitingtherelative longitudinal movement of the same, wher'ebylifting force applied to the center bar may-be transmitted directly to the driving plate.

7. Pile-driving apparatus, comprising ;-a center-bar, core leaves collapsibly associated With said center-bane driving-cap attached to said center-bar, a driving-plate interposed betweennsaid driving-cap and said core leaves,

means forpreventing longitudinal movement between said drivin late and said core leaves, :while permitting radial movement of the core leaves,v said driving-plate being formed with an internal annular flange and said centerbar being formed with-means extending beneath said annular flange and spaced therefrom just suiiiciently to contact therewith whengsaid' leaves are in collapsed position, whereby lifting-force applied to the center bar is transmitted to the driving plate and thence to the core leaves;

8. Pile-driving apparatus,comprising a center ,bar, wedging memberson the center bar,.core leaves collaps bly associated with said center bar and having cooperating wedging elements thereon, a driving plate at the I upper end of said core leaves, means for preventing longitudinal movement of said core leaves with respectto said driving plate while permitting radial j movement of the core leaves, and an element extending downwardly from said drlvingplatewithin said core leaves to a point above the upper one of said wedging members, said downwardly'extend lng. element being spaced from said upper Wedging member a distancesuch that said wedging member will contact "with said downwardly extending element when the wedging element is moved upwardly just sufficiently to permit-the collapse of the core leaves", whereby saidcore leaves, when col: lapsed, maybe supported from said center barthrough the mediumof said'driving plate.

,9. Pile-driving apparatus, comprising a center bar, collapsible core leaves, collapsing links between saidcenter bar and saidcore leaves, a driving cap, a driving plate interposed between said driving cap and said core leaves and mountedon said core leaves,. and cooperating means onsaid driving plate and said centerbar for eiiectingthewithdrawal of said core leaves'with said center bar before the longitudinal movement o1 the center bar places a withdrawing strain on said links.

10. Pile-driving apparatus, comprising a center bar, collapsible core leaves, collapsing links between said center barand said core leaves, a driving cap, a driving plate interposed between said driving cap and said core leaves and mounted on said coreleaves, said driving plate being formed with an internal annular flange, and an element on said center bar and adapted to contact with said flange to efiect Withdrawal of the core leaves with the center bar after said links have effected the collapse of'thecore leaves and before any strain is placedthereom v a 11. Pile-driving apparatus, comprising a center bar, core'leaves collapsibly associated I 7 With said center bar, a driving cap attached to, said center bar, a driving plate interposed between said driving cap'and said core leaves,

a means forpreventing longitudinal movement between; said plate and said leaves while permitting radial movement of said leaves, and 'means for releasably connecting saldfdriving cap to said driving plate. a

'12; Pile-driving apparatus, comprising a center bar, coreleaves collapsiblyi associated with said center bar, a drivingcap attached tosaid center bar, and-a driving plate interposed betweensaid driving cap and said core leaves, means for preventing longitudinal movement between-said plate and said leaves while permitting radial movement "of said leaves-, a plurality of latches carried by said driving cap and; adapted to releasablyhold said dr ving plate against movement, said driving plate beingformed at itsouter surface with recesses adapted to receive saidlatches.

said driving plate for separating said center bar from said core leaves to-coll'apsethe core leaves." 7 v,

14. Pile-driving apparatus, comprising a center bar, core leaves collapsibly associated with said-center bar, adriving cap attached to said center bar, a driving plate interposed betweensaid drivingcapand said core leaves and movable relatively to the centerbar,

means for preventing longitudinal movement,

between said plate and said leaves while permitting radial movement 7 of said leaves, a

transverse shaft carried bysa-id driving ca-p,

and: a U-s-haped lever element mounted ferrotation on saidshaft and formed with a pres-V sure surface adapted to press against the upper surface ofthedriving plate when upward pressure is applied toot-he bow of the U.

'15, Bile-driving apparatus, comprising a center bar, core leaves collapsibly associated with said center bar and adaptedto bewedged outwardly when said center bar is moved downwardly with respect thereto, a driving cap attached to the upper end of said center bar, a transverse shaft on said driving cap, a drivingplate interposed between said drivingcap and said leaves and movable relatively to said bar, means for preventing 'longitudinal movement between said plate and said leaves while permitting radial movement of said'leaves, a U-shaped lever mounted for rotation on said transverse shaft and adapted, when pressure is applied to the bow of the U, to impart relative longitudinal movement to saidcenter bar and said core leaves to break the we'dging fit therebetween'. v

16; Pile-driving apparatus comprising a center bar, a plurality of core leaves surrormdingsaid center bar and adapted to move radially and longitudinally thereof, cooperating wedging members on said center bar and core leaves respectively, a driving plate disposed above said core leaves, means for preventing longitudinal -movement between said plate and said leaves while permitting radial movement of said" leaves, and an annular flange extending downwardly from said driving plate and surrounding said core leaves when'the same are in both collapsed and expanded position and adapted to-limit the-"ex ansion of said coreleaves. 17. 'le-driving apparatus comprisin g a center bar, a plurality of core leaves surrounding said center bar and adapted to'move radially and longitudinally thereof, cooperating wedging members on said center bar andcore leaves respectively, a member dis posed above said core leaves and'provided with an annular rim surrounding said core leaves at all times during the operation of said ap aratus, and means for preventing longitu inal movement between said member and said leaves while permitting radial movement of said leaves.

18. Pile-driving apparatus comprising a driving cap, a center bar carried thereby, exansible and collapsible coreleaves surroundmg said center bar, a driving plate disposed between said driving cap and the upper ends of'said core leaves, said driving plate and said core leaves being movable as a unit relative to-said" center bar, and a downwardlyextending flange on'* said driving plate surrounding theupper ends of said core'leaves for limiting the expansion thereof. 19(Pile-drivihg apparatus comprising a center bar, aplurality. of core leaves surrounding said center bar, pivoted link connections between said core leaves and said center bar, cooperating \vedging members carried by said center bar and said core leaves, a driving plate disposed above said 20. Pile-driving apparatus comprising a center bar, a plurality of core leaves surrounding'said center bar, a driving plate disposed about said'cor'e leaves'and m'ovable longitudinally therewith with respect to said center bar, cooperating wedging members on said core leaves and said center bar for expanding said core leaves, means on said driving plate-for limiting the expansion of said core leaves, cooperating means on said center bar and said'driving plate for lifting said drivingplate and said core leaves when the core leaves are collapsed, and cam means associated with said center bar and operable against the upper surface of said driving plate for breaking Wedging action of said wedging members to permit collapsing of the core leaves. I

21. In an apparatus of the character described, a central unit comprising a longitudinally-extended bar having longitudinally-spaced wedging members thereon and an outer unit comprisin a driving plate and a plurality of expansi le and collapsible core leaves suspended therefrom, means for preventing longitudinal movement between said plate and saidleaves while permitting radial movement of said leaves, each of said core leaves being provided with lon 'tudinallyspaced wedging members adapte to cooperate with the aforesaid wedging members, said units having a limited longitudinal movement with respect to each other.

22. Pile-driving apparatus comprising a center bar, a plurality of core leaves surrounding said center bar, pivoted link connections between said core leaves and said center bar, cooperating wedging members carried by said center bar and said core leaves, a driving plate disposed above said core leaves and movable longitudinally therewith with respect to said center bar, means for preventing longitudinal movement between said driving plate and said core leaves while permitting radial movement of the core leaves, and cooperating means on said center bar and said driving plate for lifting said driving plate and said core leaves upwardly to the end of the collapsing movement of the core leaves whereby lifting strain on said links is avoided;

In testimony whereof I aflix my si ature.

ANNABEL BARNES,

Eweoutria: of the Last Will and Testament of Albert F, Barnes, Deceased. 

